MalwarePublished 7 Jul 2026Updated 24 Sep 2026

zwcalx6 (RubyGems) · Malicious Code

Affects zwcalx6Source GCVE Database

Malicious package : remove zwcalx6 and rotate any secrets on hosts that installed it.

Data as of 26 Oct 2026, 16:06 UTC

Classification

Malicious package

Published to RubyGems · OSV MAL-2026-9849

What to do

Remove zwcalx6 from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
RubyGemszwcalx6`pkg:gem/zwcalx6`Other threats	Affected =0.0.490	Fixed in–

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Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: ghsa-malware (e1adc340371cc0dd748001613ce70b8ecaeabd3dba070d1e9ad4b2f6064baa58) --- Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/9fbb5fba02ba2f02395d3d2d43c31b2c482b7a9d/osv/malicious/rubygems/zwcalx6/MAL-2026-9849.json))

Impact

Use of the malicious package 'zwcalx6' version 0.0.490 could lead to execution of harmful code within environments that install or run this package. The exact impact depends on the malicious payload, which is not detailed here. No known exploits have been reported, but the presence of malicious code poses a risk to systems using this package version.

Defensive guidance

The best mitigation is to avoid using the affected version (=0.0.490) of the 'zwcalx6' package. Users should verify package integrity and source authenticity before installation. Monitor vendor or repository advisories for updates or removal of the malicious package.

Summary

The package 'zwcalx6' version 0.0.490 in the RubyGems ecosystem is flagged as malicious code according to the OpenSSF malicious packages database (MAL-2026-9849). This is a supply chain threat involving a package containing harmful code rather than a vulnerability in the package itself. No further technical details or exploitation methods are documented in the provided data.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 18 Jul 2026, 16:42 UTC

Technical details

References

Community reviews